Difference between revisions of "Monomorium disertum"

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==Identification==
 
==Identification==
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Bolton (1987) - A small yellowish species which seems related to ''[[Monomorium australe]]'' and its immediate allies, ''disertum'' differs from them by having relatively shorter scapes and lacking backward directed hairs on the petiole node. Apart from this ''disertum'' appears to have only a single pair of standing hairs on the first gastral tergite in front of the apical transverse row, whereas ''australe'' and allies have 2-3 pairs.
  
 
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{{Nomenclature}}
 
{{Nomenclature}}
 
*''<span style='color:red;font-weight:bold;'>disertum.</span> Monomorium salomonis'' var. ''diserta'' Forel, 1913j: 216 (w.) ZIMBABWE. Combination in ''M. (Xeromyrmex''): Wheeler, W.M. 1922a: 872. Subspecies of ''termitarium'': Santschi, 1928f: 194. Raised to species and material of the unavailable name ''petulans'' referred here: Bolton, 1987: 342.
 
*''<span style='color:red;font-weight:bold;'>disertum.</span> Monomorium salomonis'' var. ''diserta'' Forel, 1913j: 216 (w.) ZIMBABWE. Combination in ''M. (Xeromyrmex''): Wheeler, W.M. 1922a: 872. Subspecies of ''termitarium'': Santschi, 1928f: 194. Raised to species and material of the unavailable name ''petulans'' referred here: Bolton, 1987: 342.
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===Description===
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====Worker====
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Bolton (1987) - TL 2.0-2.2, HL 0.52-0·60, HW 0.41-0.48, CI 77-81, SL 0.38-0.43, SI 89-93, PW 0.28-0.31, AL 0.58-0.64 (9 measured).
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Anterior margin of median portion of clypeus transverse to shallowly concave. Sides of head extremely weakly convex in full-face view, the occipital margin very shallowly concave. Antennal scapes relatively short, SI < 95. Maximum diameter of eye 0.25-0.27 x HW, with 7-9 ommatidia in the longest row. Metanotal groove feebly impressed. Dorsum of head apparently with a single pair of standing hairs behind the level of the frontal lobes, situated just behind the level of the eyes. The available material is abraded and a second pair may be present close to the occipital margin. Dorsal alitrunk without hairs. Petiole node without hairs, the postpetiole with one backward directed pair. First gastral tergite with a single pair of standing hairs in front of the apical transverse row, situated approximately at the midlength of the sclerite. Head very finely shagreenate to reticulate-shagreenate, mid-dorsally usually with extremely fine longitudinal striolate markings. Pronotal dorsum finely shagreenate to reticulate-shagreenate, the sculpture becoming more obviously reticulate to reticulate-punctate on the propodeum. First gastral tergite with superficial reticular patterning only. Colour pale brownish yellow, the gaster sometimes slightly darker than the alitrunk.
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===Type Material===
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Bolton (1987) - Syntype workers, Zimbabwe: Shiloh, 10.v.1913, no. 172 (G. Arnold) ({{BMNH}}; {{MHNG}}) [examined].
 
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===Description===
 
  
 
==References==
 
==References==

Revision as of 11:58, 13 July 2019

Monomorium disertum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. disertum
Binomial name
Monomorium disertum
Forel, 1913

Monomorium disertum casent0902216 p 1 high.jpg

Monomorium disertum casent0902216 d 1 high.jpg

Specimen Labels

Identification

Bolton (1987) - A small yellowish species which seems related to Monomorium australe and its immediate allies, disertum differs from them by having relatively shorter scapes and lacking backward directed hairs on the petiole node. Apart from this disertum appears to have only a single pair of standing hairs on the first gastral tergite in front of the apical transverse row, whereas australe and allies have 2-3 pairs.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Zimbabwe (type locality).

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • disertum. Monomorium salomonis var. diserta Forel, 1913j: 216 (w.) ZIMBABWE. Combination in M. (Xeromyrmex): Wheeler, W.M. 1922a: 872. Subspecies of termitarium: Santschi, 1928f: 194. Raised to species and material of the unavailable name petulans referred here: Bolton, 1987: 342.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Bolton (1987) - TL 2.0-2.2, HL 0.52-0·60, HW 0.41-0.48, CI 77-81, SL 0.38-0.43, SI 89-93, PW 0.28-0.31, AL 0.58-0.64 (9 measured).

Anterior margin of median portion of clypeus transverse to shallowly concave. Sides of head extremely weakly convex in full-face view, the occipital margin very shallowly concave. Antennal scapes relatively short, SI < 95. Maximum diameter of eye 0.25-0.27 x HW, with 7-9 ommatidia in the longest row. Metanotal groove feebly impressed. Dorsum of head apparently with a single pair of standing hairs behind the level of the frontal lobes, situated just behind the level of the eyes. The available material is abraded and a second pair may be present close to the occipital margin. Dorsal alitrunk without hairs. Petiole node without hairs, the postpetiole with one backward directed pair. First gastral tergite with a single pair of standing hairs in front of the apical transverse row, situated approximately at the midlength of the sclerite. Head very finely shagreenate to reticulate-shagreenate, mid-dorsally usually with extremely fine longitudinal striolate markings. Pronotal dorsum finely shagreenate to reticulate-shagreenate, the sculpture becoming more obviously reticulate to reticulate-punctate on the propodeum. First gastral tergite with superficial reticular patterning only. Colour pale brownish yellow, the gaster sometimes slightly darker than the alitrunk.

Type Material

Bolton (1987) - Syntype workers, Zimbabwe: Shiloh, 10.v.1913, no. 172 (G. Arnold) (The Natural History Museum; Musee d'Histoire Naturelle Genève) [examined].

References

  • Bolton, B. 1987. A review of the Solenopsis genus-group and revision of Afrotropical Monomorium Mayr (Hymenoptera: Formicidae). Bull. Br. Mus. (Nat. Hist.) Entomol. 54: 263-452 (page 342, Raised to species, and material of the unavailable name petulans referred here.)
  • Forel, A. 1913k. Ameisen aus Rhodesia, Kapland usw. (Hym.) gesammelt von Herrn G. Arnold, Dr. H. Brauns und Anderen. Dtsch. Entomol. Z. 1913(Su Suppl: 203-225 (page 216, worker described)
  • Santschi, F. 1928f. Descriptions de nouvelles fourmis éthiopiennes (suite). Rev. Zool. Bot. Afr. 16: 191-213 (page 194, Stirps of termitarium)
  • Wheeler, W. M. 1922j. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VIII. A synonymic list of the ants of the Ethiopian region. Bull. Am. Mus. Nat. Hist. 45: 711-1004 (page 872, Combination in M. (Xeromyrmex))